YEAR MONTH MEAN STDEV COUNT 2002 1 nan nan 0 2002 2 nan nan 0 2002 3 nan nan 0 2002 4 nan nan 0 2002 5 nan nan 0 2002 6 nan nan 0 2002 7 5.90345e+01 3.47810e-01 51 2002 8 5.81727e+01 5.39039e-01 136 2002 9 5.58126e+01 8.06887e-01 158 2002 10 4.91261e+01 2.15337e+00 185 2002 11 4.29930e+01 1.31975e+00 487 2002 12 4.01559e+01 2.47691e-01 422 2003 1 4.20835e+01 1.30967e+00 580 2003 2 4.76018e+01 1.94810e+00 372 2003 3 5.44614e+01 1.38554e+00 200 2003 4 5.93626e+01 4.47758e-02 60 2003 5 6.02167e+01 2.34642e-01 143 2003 6 6.02387e+01 2.02235e-01 59 2003 7 5.88271e+01 2.89285e-01 37 2003 8 5.86607e+01 2.79143e-01 92 2003 9 5.42598e+01 1.70391e-01 79 2003 10 5.03543e+01 1.85296e+00 385 2003 11 4.24011e+01 6.27307e-01 95 2003 12 4.00677e+01 1.85719e-01 246 2004 1 4.18157e+01 1.26622e+00 428 2004 2 4.75105e+01 1.84418e+00 546 2004 3 5.47362e+01 1.27230e+00 326 2004 4 5.85770e+01 6.89848e-01 399 2004 5 6.00876e+01 2.18766e-01 37 2004 6 5.95975e+01 5.55513e-01 129 2004 7 5.89053e+01 3.53426e-01 177 2004 8 5.77169e+01 3.50533e-01 76 2004 9 5.42108e+01 1.17527e+00 142 2004 10 5.04313e+01 5.24644e-01 118 2004 11 4.27981e+01 1.67696e+00 173 2004 12 4.00015e+01 2.07578e-01 324 2005 1 4.26606e+01 1.51757e+00 170 2005 2 4.74145e+01 1.98197e+00 142 2005 3 5.46423e+01 1.49549e+00 493 2005 4 5.82945e+01 7.89108e-01 267 2005 5 6.00842e+01 2.07545e-01 135 2005 6 nan nan 0 2005 7 5.87183e+01 3.49868e-01 79 2005 8 5.86995e+01 3.09031e-01 115 2005 9 5.44400e+01 8.94403e-01 109 2005 10 4.95896e+01 2.66316e+00 148 2005 11 4.39174e+01 1.14263e+00 278 2005 12 4.01621e+01 2.81329e-01 391 2006 1 4.21509e+01 1.35706e+00 156 2006 2 4.77645e+01 1.93475e+00 498 2006 3 5.45295e+01 1.84801e+00 325 2006 4 5.88306e+01 8.80387e-01 201 2006 5 6.03353e+01 2.35313e-01 214 2006 6 5.94324e+01 1.54429e-01 59 2006 7 5.88792e+01 3.58676e-01 51 2006 8 5.76891e+01 6.97334e-01 97 2006 9 5.44745e+01 1.05022e+00 220 2006 10 5.01553e+01 2.50990e+00 219 2006 11 4.40113e+01 1.74766e+00 426 2006 12 4.00001e+01 2.39754e-01 377 2007 1 4.23849e+01 1.69224e+00 457 2007 2 4.78197e+01 1.74343e+00 676 2007 3 5.40522e+01 1.96590e+00 223 2007 4 5.86854e+01 4.22680e-01 201 2007 5 6.01158e+01 2.75150e-01 158 2007 6 5.92850e+01 1.01637e-01 68 2007 7 5.88953e+01 3.89660e-01 124 2007 8 5.79250e+01 1.29268e-01 64 2007 9 5.70575e+01 1.26577e-01 104 2007 10 4.94191e+01 5.31212e-01 125 2007 11 4.37505e+01 1.58205e+00 331 2007 12 4.00646e+01 2.30437e-01 234 2008 1 4.20347e+01 1.55561e+00 394 2008 2 4.80220e+01 1.85281e+00 537 2008 3 5.41329e+01 1.92983e+00 228 2008 4 5.93453e+01 5.53886e-01 186 2008 5 6.03364e+01 2.07673e-01 176 2008 6 5.94352e+01 5.97541e-02 59 2008 7 5.88981e+01 3.55069e-01 157 2008 8 5.85338e+01 2.59934e-01 130 2008 9 5.57186e+01 1.11102e+00 254 2008 10 5.03383e+01 2.11950e+00 329 2008 11 4.35780e+01 1.45905e+00 496 2008 12 4.01299e+01 2.04135e-01 330 2009 1 4.27472e+01 1.39622e+00 412 2009 2 4.74309e+01 1.81351e+00 346 2009 3 5.50162e+01 2.05002e+00 156 2009 4 5.82422e+01 5.93585e-01 312 2009 5 6.01711e+01 2.11175e-01 87 2009 6 5.97031e+01 4.83047e-01 101 2009 7 5.90140e+01 3.35534e-01 126 2009 8 5.82210e+01 6.53193e-01 113 2009 9 5.48682e+01 1.20999e+00 335 2009 10 4.99369e+01 1.47267e+00 368 2009 11 4.26710e+01 7.64901e-01 236 2009 12 4.00648e+01 3.16130e-01 381 2010 1 4.20853e+01 1.36994e+00 475 2010 2 4.72802e+01 1.35570e+00 365 2010 3 5.53453e+01 1.69120e+00 376 2010 4 5.80300e+01 9.53184e-01 183 2010 5 6.00836e+01 2.80120e-01 193 2010 6 5.92483e+01 9.85695e-02 65 2010 7 5.87647e+01 3.40975e-01 54 2010 8 5.81588e+01 3.39844e-01 152 2010 9 5.54711e+01 1.12027e+00 205 2010 10 4.89665e+01 1.09946e+00 255 2010 11 4.23702e+01 7.76181e-01 278 2010 12 4.03944e+01 4.00229e-01 362 2011 1 4.25764e+01 1.04848e+00 460 2011 2 4.73993e+01 1.76872e+00 436 2011 3 5.46613e+01 2.04735e+00 348 2011 4 5.83035e+01 1.02134e+00 334 2011 5 6.02229e+01 2.15713e-01 76 2011 6 5.93143e+01 5.46552e-02 49 2011 7 5.91354e+01 3.02198e-01 64 2011 8 5.71077e+01 1.19107e-01 8 2011 9 5.57208e+01 1.61231e+00 175 2011 10 4.87889e+01 1.99818e+00 185 2011 11 4.33093e+01 8.41480e-01 250 2011 12 4.00899e+01 1.42809e-01 197 2012 1 4.16997e+01 1.12938e+00 476 2012 2 4.81985e+01 2.03157e+00 365 2012 3 5.31895e+01 9.11151e-01 223 2012 4 5.83994e+01 3.32305e-01 175 2012 5 6.05870e+01 1.93543e-01 64 2012 6 5.94211e+01 1.05676e-01 108 2012 7 5.89182e+01 3.68430e-01 89 2012 8 5.74479e+01 5.32395e-01 69 2012 9 5.50548e+01 1.27150e+00 379 2012 10 4.95356e+01 1.89368e+00 272 2012 11 4.35929e+01 1.43849e+00 330 2012 12 4.01769e+01 2.31246e-01 398 2013 1 4.16619e+01 9.89401e-01 316 2013 2 4.85068e+01 2.20877e+00 492 2013 3 5.42599e+01 1.64439e+00 333 2013 4 5.85717e+01 4.69487e-01 282 2013 5 6.02836e+01 2.52662e-01 137 2013 6 nan nan 0 2013 7 5.88101e+01 3.47804e-01 144 2013 8 5.84037e+01 6.15039e-01 145 2013 9 5.46333e+01 8.74626e-01 259 2013 10 4.98341e+01 1.88283e+00 142 2013 11 4.41435e+01 1.03332e+00 270 2013 12 4.00673e+01 1.82308e-01 385 2014 1 4.21537e+01 1.33963e+00 523 2014 2 4.76334e+01 1.67082e+00 416 2014 3 5.49556e+01 1.63586e+00 479 2014 4 5.88428e+01 7.53185e-01 269 2014 5 6.01035e+01 2.43179e-01 188 2014 6 5.92955e+01 9.60307e-02 129 2014 7 5.92779e+01 3.00165e-01 35 2014 8 5.83462e+01 5.20689e-01 120 2014 9 5.47745e+01 1.21938e+00 218 2014 10 4.86969e+01 1.55103e+00 301 2014 11 4.33690e+01 1.51595e+00 412 2014 12 4.00421e+01 1.70485e-01 402 2015 1 4.22951e+01 1.47807e+00 364 2015 2 4.68376e+01 1.87525e+00 232 2015 3 5.53432e+01 1.27439e+00 198 2015 4 5.89506e+01 6.52922e-01 230 2015 5 6.02478e+01 1.56272e-01 108 2015 6 5.96101e+01 3.97626e-01 37 2015 7 5.89642e+01 2.43982e-01 13 2015 8 5.85654e+01 3.34683e-01 240 2015 9 5.57682e+01 1.34040e+00 266 2015 10 4.90584e+01 1.73825e+00 328 2015 11 4.39222e+01 1.71419e+00 310 2015 12 3.99940e+01 1.22668e-01 457 2016 1 4.18119e+01 1.40203e+00 549 2016 2 4.72836e+01 2.12134e+00 216 2016 3 5.54601e+01 9.31668e-01 306 2016 4 5.83678e+01 5.49169e-01 306 2016 5 6.02705e+01 2.66624e-01 98 2016 6 5.93118e+01 9.46904e-02 110 2016 7 5.89987e+01 3.18784e-01 64 2016 8 nan nan 0 2016 9 5.52441e+01 1.03894e+00 164 2016 10 4.92526e+01 1.16861e+00 121 2016 11 4.16657e+01 3.90781e-01 31 2016 12 4.02698e+01 3.95022e-01 475 2017 1 4.25199e+01 1.29599e+00 424 2017 2 4.77818e+01 1.71700e+00 390 2017 3 5.40283e+01 1.68957e+00 151 2017 4 5.85411e+01 8.06513e-01 113 2017 5 6.00768e+01 2.70355e-01 233 2017 6 5.92958e+01 6.32189e-02 119 2017 7 5.88034e+01 3.37266e-01 114 2017 8 nan nan 0 2017 9 5.68124e+01 1.59800e-01 114 2017 10 4.92857e+01 1.63515e+00 237 2017 11 4.40432e+01 1.69754e+00 215 2017 12 4.01253e+01 3.55983e-01 315 2018 1 4.27320e+01 1.57278e+00 377 2018 2 4.83939e+01 1.52004e+00 300 2018 3 5.43262e+01 1.68722e+00 335 2018 4 5.86477e+01 8.25412e-01 385 2018 5 6.02446e+01 2.33468e-01 257 2018 6 5.96511e+01 4.86721e-01 74 2018 7 5.89464e+01 3.47596e-01 127 2018 8 5.82553e+01 3.38171e-01 119 2018 9 5.48128e+01 1.33569e+00 191 2018 10 4.87279e+01 2.03256e+00 296 2018 11 4.24576e+01 7.68643e-01 371 2018 12 4.01014e+01 2.06595e-01 296 2019 1 4.17170e+01 1.13060e+00 432 2019 2 4.71427e+01 1.89027e+00 436 2019 3 5.49385e+01 1.41480e+00 323 2019 4 5.92415e+01 3.28964e-01 260 2019 5 6.03691e+01 2.26821e-01 55 2019 6 5.96751e+01 5.35791e-01 192 2019 7 5.89959e+01 3.39368e-01 50 2019 8 5.82118e+01 4.20515e-01 197 2019 9 5.60293e+01 9.97160e-01 262 2019 10 5.16355e+01 1.09667e+00 205 2019 11 4.38000e+01 1.62522e+00 450 2019 12 4.01320e+01 3.09288e-01 449 2020 1 4.32149e+01 1.30969e+00 220 2020 2 4.75751e+01 2.25942e+00 514 2020 3 5.32318e+01 1.86382e+00 284 2020 4 5.88329e+01 8.20395e-01 505 2020 5 6.01962e+01 2.67874e-01 115 2020 6 5.94728e+01 4.12982e-01 241 2020 7 5.90883e+01 3.26577e-01 175 2020 8 5.86753e+01 3.37166e-01 127 2020 9 5.59407e+01 1.25625e+00 127 2020 10 4.94437e+01 1.31505e+00 259 2020 11 4.34804e+01 1.88017e+00 422 2020 12 4.01385e+01 3.85891e-01 402 2021 1 4.20213e+01 1.16868e+00 548 2021 2 4.86096e+01 2.23207e+00 373 2021 3 5.42228e+01 1.48351e+00 265 2021 4 5.87591e+01 8.90474e-01 185 2021 5 6.00379e+01 2.19144e-01 127 2021 6 5.92379e+01 7.15823e-02 31 2021 7 5.89331e+01 2.84624e-01 193 2021 8 5.86587e+01 2.90130e-01 36 2021 9 5.48141e+01 1.20502e+00 211 2021 10 4.88048e+01 1.85951e+00 371 2021 11 4.25723e+01 1.08637e+00 332 2021 12 4.01739e+01 2.95050e-01 374 2022 1 4.22523e+01 1.40261e+00 636 2022 2 4.69759e+01 2.23745e+00 301 2022 3 5.33146e+01 1.20565e+00 169 2022 4 5.90825e+01 4.32127e-02 31 2022 5 6.02734e+01 1.86810e-01 38 2022 6 5.96851e+01 6.10995e-01 288 2022 7 5.90651e+01 3.07202e-01 85 2022 8 5.81241e+01 4.73027e-01 166 2022 9 5.40234e+01 8.25921e-01 147 2022 10 4.99381e+01 1.26048e+00 213 2022 11 4.30926e+01 1.57645e+00 453 2022 12 4.01542e+01 3.67365e-01 834 2023 1 4.20830e+01 1.22903e+00 623 2023 2 4.82624e+01 1.62277e+00 338 2023 3 5.33753e+01 1.87879e+00 490 2023 4 5.90291e+01 7.05177e-01 629 2023 5 6.01677e+01 2.23166e-01 476 2023 6 5.93543e+01 9.65685e-02 193 2023 7 nan nan 0 2023 8 5.82818e+01 5.21687e-01 300 2023 9 5.54020e+01 1.26234e+00 243 2023 10 5.03221e+01 9.69686e-01 377 2023 11 4.32458e+01 1.51897e+00 431 2023 12 4.03010e+01 3.59795e-01 489 2024 1 4.20593e+01 1.38593e+00 405 2024 2 4.86795e+01 1.08916e+00 506 2024 3 5.47326e+01 1.30103e+00 362 2024 4 5.75760e+01 2.73724e-01 9